Sand cutting, sifting, lump-crushing, and mixing machine.



PATENTED APR. 21, 1903.

N; K. sxow. SAND CUTTING, SIFTING, LUMP GRUSHING, AND MIXING MACHINE.

APPLICATION FILED JUNE 9, 1902I 3 SHEETS-SHEET 1.

NoIIonnL.

No. 725,884. PATENTED APR, 21,1903.

- N. K. SKOW.

SAND CUTTING, SIFTING, LUMP GRUSHING, ANDMIXIISTG MACHINE;

APPLICATION FILED JUNE 9, 1902.

N0 MODEL. 3 SHEETS-SHEET 2.

m: aonms Pcrgasommuormxmo. msnmamm n. c.

No. 725,884. PATENTED APR. 21, 1903. N. K. SKOW SAND CUTTING, SIFTING,LUMP CRUSHING, AND MIXING MACHINE.

APPLICATION FILED JUNE 9, 1902.

N0 MODEL. LSHEETS-SHEE'I 3.

UNITED STATES.

P TENT OFFICE.

NIELsK. sx'ow, onivEwroN, IOWA.

SAND CUTTING, slums, LUMP-QRUSHING,' AND MIXINGMACH'INE.

SPECIFICATION forming part of Letters Fatent o. 725,884, dated. April21, 1903.

Application filed June 9, 1902. Serial No. 110,738. (No model.)

To all whom it may concern."

Be it known that I, NIELS K. SKOW, a citi-= improved means for cutting,elevating, conveyin g, sifting, and depositing molders sand for crushingthe lumps in such sand, and for removing and collecting the gaggers,nails, and scrap that may accumulate in such sand preparatory to usingthe sand again in the making of molds.

My invention consists in the construction of a machine for treatingm'olders sand, as hereinafter set forth,pointed outin my claims, andillustrated by the accompanying drawings, in which- Figure 1 is a sideelevation of the complete machine. Fig. 2'is a vertical section of themachine on the indicated line 2 2 of Fig. 3. Fig. 3 is a front endelevation of the complete machine. Fig. 4 is a rear end elevation of thecomplete machine. Fig. 5 is'a plan'of the complete machine. Figs. 6 and7 are detail views of parts of the machine.

In the construction of the machine as shown the numeral 10 designatesthe main supporting-shaft, mounted at its ends in combined traction andsupporting Wheels 11 12. The shaft 10 extends from side to side of thema chine, and the wheels 11 12 are relatively large and strong. videdand preferably are made of channeliron in endless form. The side frames13 14 are arranged vertically, as shown, parallel with each other nearthe end portions of the shaft 10 and are connected by a plurality ofcross-bars 15 in various positions. Vertical bars 16 17 are mountedacross and fixed at their ends to the forward portions of the sideframes 13 14.- Bearings 18 19 are fixed to and project forward from thevertical bars 16 17 at points below the centers of said bars, and

a shaft 20 is mounted for oscillation in said bearings and extends fromside to side of the machine. Bearings 21 22 are mounted on the verticalbars 16 17 directly opposite the bearings 18 19 and extend rearwardtherefrom. Segment-slots 23 are formed in the bearings Side frames 13 14are pro 21 22 at the rear of the vertical bars. Crankarms 2425 aremounted on and extend rearward from the end portions of the shaft 20,and the end portions of the shaft 10 extend through the rear endportions of said crankarms. Bolts 26 27 are mounted in the crankarms 24'25 and extend through the segmentslots 23 of the bearings 21 22, andnuts on said bolts serve to connect the crank-arms adjustably tosaidbearings. By this means it is possible to vary and adjust the elevationof the side frames l3 14 relative to the horizontal plane of the shaft10. Caster-bearings 28 29 are mounted on the rear lowercorner portionsof the side frames 13 14, and caster- Wheels 30 31 are journaled in saidbearings and support said side frames conjunctively with the wheels 1112. Bearings 32 33 are mounted on the centers of the upper portions ofthe side frames 13 14, and a drive-shaft 34 is journaled in saidbearings and extends from side to side of the machine. A sprocketwheel35 is mounted on one end portion of the drive-shaft 34 and is connectedby a sprocket-chain 36 to a smaller sprocketwheel 37 on'one end portionof a counter-shaft 38, which counter-shaft also is mounted in bearingson the upper portions of the side frames. A sprocket-wheel 39 on thecentralportion of the counter-shaft 38 is connectedby a chain 40 to theshaft of an electric motor 41, carried on brackets fixed to and risingfrom the side frames. Current is supplied to the motor '41 through aflexible conductor 42, leading from a source of energy, (not shown,) andsaid conductor should be of such length as will permit the machine andmotor thereon to travel 52, preferably made of sheet metal and ar-.

ranged to extendfrom side to side of the machine. The elevation of theside frames relative to the main shaft 10 is such that the buckets orscoops 52 just clear the surface of the molding-floor, over which themachine travels, and in the travel of such buckets receive and elevatesand and objects intermingled therewith. Gathering-plows 53, Fig. 3, maybe attached to the lower forward corners of the side frames and extendforward therefrom in diverging planes to engage and gather the sand fromthe molding-floor into the path of travel of the scoops or buckets 52.Abail 54is journaled at its ends in vertical bars 55 56, mounted'in theside frames, and the body portion of said bail is in a plane parallelwith its journaled end portions and is pivotally connected to theforward end portion of a screen-frame 57. The screen-frame 57 extendsrearward and downward from the bail 54 and is supported at its rearlower end on upright spring-arms 58 59, which arms are fixed at theirlower ends to and rise from the rear lower corners of the side frames.An eccentric 60 is mounted rigidly on the counter-shaft 38 and carriesone end of a pitman 61, the other end of said pitman being connectedpivotally to the body portion of the bail 54. Thus in the rotation ofthe counter-shaft 38 the bail 54 is oscillated, resulting in a vibrationof the screen-frame 57, the spring-arms 58 59 swinging to and fro withsaid screen-frame. A beater-shaft 62 is mounted for rotation in bearingsfixed to the upper portions of the side frames 13 14 at the rear of thecountershaft 38, and heaters 63 64 are mounted on said beater-shaft andhave their orbit of travel in close proximity to the upper surface ofthe screen 65 in the screen-frame 57. A sprocket-wheel 66 on thebeater-shaft 62 is connected to a sprocket-wheel 67 on the driveshaft 34by a sprocket-chain 68. Thus are the beater-shaft and heaters driven tothe end of engaging and crushing or breaking the clods and lumps in thesand on the screen 65. Holes are formed in the rear corners of thescreen of such size as will permit the passage therethrough of thegaggers, nails, and scrap from the sand, and adefiector 69 is mounted inthe rear portion of said screen and directs such foreign substanceslaterally from the screen to said holes. The foreign substances dropthrough the holes in the rear corners of the screen and are received andcontained in receptacles 70 71, carried on the side frames beneath saidholes. Gathering-boards 72 73 are fixed to the side frames 13 14 beneaththe screen-frame 57 and serve to direct the sifted sand falling fromsaid screen into a compact pile between the colter-wheels.

Hand-cranks 74 75 may be mounted on the drive-shaft 34 for the manualrotation of said shaft, if desired.

A small sprocket-wheel 76 is mounted on the extremity of the shaft 49and is connect ed by a chain to a larger sprocket-wheel 77 on acounter-shaft 78, journaled for rotation in bearings fixed to theforward portions of the side frames. Arms 79 are pivoted on and extendrearward and upward from the counter-shaft 78 and are formed withhandles at their upper rear ends. Bolts 81, provided with wing-nuts, aremounted through the upper end portions of the arms 79 80 and extendthrough segment-slots 82 in brackets 83 84, fixed to and rising from theside frames 13 14; A shaft 85 is mounted in and connects the upperportions of the arms 79 80, and sprocket-wheels on said shaft areconnected by chains 86 87 to sprocket-wheels 88 89 on the counter-shaft78. The sprocketchains 86 87 also engage at times withsprocketwheels 9091, formed on the supporting and traction wheels 11 12. It is thus seenthat the motion of the motor is transferred or communicated to thesupporting and traction wheels through the counter-shaft 38,sprocketwheel 37, chain 36, wheel 35, drive-shaft 34, conveyorchains 4546, counter-shaft 49, shaft 78, and chains 86 87 and their respectivecon nectious. In the rotation of the supporting and traction wheels themachine is advanced conjunctively with and at a speed proportioned tothe travel of the buckets or scoops 52, and the sand is gathered fromthe molding-floor, elevated by the scoops, and deposited on the screen65. In the vibration of the screen 65 the sand is sifted through themesh thereof, the clods and lumps are broken by the heaters, and theforeign substances are deposited in the receptacles 70 71 pend ingmanual removal. When the bars or arms 79 80 are adjusted with the bolts81 in the uppermost portions of the slots 82, the chains 86 87 aredisconnected from the sprocketwheels 90 91, and the rotation of thesupporting and traction wheelsis stopped. Such adjustment is necessaryat times when it is desired to elevate and sift an exceptionally-largequantity of sand in one locality.

Sometimes it is desirable to turn the machine about in a relativelysmall space, and hence I have provided a jack constructed and mounted asfollows: A cross-bar 92 is fixed to and connects the side frames 13 14at the rear of the shaft 10, and guide-blocks 93 94 are fixed to saidbar. Bearings 95 96 are mounted on the bar 92, and a shaft 97 is mountedfor rotation in said bearings and extends to one side of the machine. Awinch or crank may be detachably mounted on the angular outer endportion of the shaft 97. A jack 98 is provided and formed with a baseand a stem rising from the base through the bar 92 and between theblocks 93 94. One edge of the stem is toothed and meshes with a pinion99 on the shaft 97. Normally the jack is carried with its base justclearing the fioor. When it is desired to turn the machine in a smallspace, the shaft 97 is rotated manually tocause the pinion 99 to depressthe stem of the jack, and when the base of the jack contacts with themolding-floor and the rotation of the pinion is continued the frame ofthe machine and the supporting and traction wheels are lifted. Themachine may then be balanced on the jack and swung around, the base ofthe jack turning on the floor in the turning of the machine.

I claim as my invention 1. A machine of the class described, comprisingthe wheeled truck or frame, the elevatin g mechanism mounted therein,the traction-wheels mounted on the frame, the gearwheels mounted on thetraction-Wheels, the

oscillatin g frame mounted on the forward end of the main frame, gearingon'the oscillating frame geared to the elevating mechanism and gearingon the oscillating frame geared to the gear-wheels on thetraction-wheels, a horizontally-vibrating screen arranged to receivesand from the elevating mechanism, driving connections between theelevating mechanism and said screen, a beater mounted over the screenand arranged to engage the sand thereon, and receptacles mounted on themain frame and arranged to receive articles from'the surface of thescreen.

2. In a machine of the'class described, the main frame, the axle mountedfor vertical adjustment in said main frame, traction mechanism connectedto said axle, secondary frames arranged for manual oscillation on theforward end of the mainframe, gear connections between the oscillatingframes and the traction mechanism, sand-elevating mechanism on the mainframe geared to the mechanism on the oscillating frame, the screenmounted for reciprocation approximately in ahorizontal plane in the mainframe, and receptacles arranged to receive articles from the surface ofsaid screen.

3. In a machine of the class described, the main frame, thetraction-wheels supporting the same, the caster-Wheels supporting therear end of the main frame,'gear-wheels on the traction-Wheels,sand-elevating mechanism on the main frame, levers mounted on the mainframe and arranged for oscillatory adjustment, sprocket-gearing carriedby said levers and arranged for adjustment relative to and engagement bythe gear-wheels on the sprocket-Wheels and sprocket, gearing carried bysaid levers and arranged for engagement with the elevating mechanism, ascreen, a beater and receptacles arranged to receive articles from'thesurfaceof said screen.

4. A machine of the class described, comprising the wheeled truck orframe, the elevating mechanismniounted therein and consisting ofhorizontal shafts, sprocket-Wheels on said shafts, sprocket chains onsaid sprocket-wheels and scoops connected to and connecting said'chains,the traction-Wheels mounted on the frame, the gear-wheels rigidlymounted on the traction-wheels, the oscillating frame hinged at itslower end on the forward end of the main frame, gearing'on theoscillating frame geared'to the elevating mechanism, gearing on theoscillating frame consisting of horizontal shafts, sprocket- Wheels on'said shafts, and chains on said sprocket-Wheels engaging the gear-Wheelson the traction-wheels, and means for sifting the sand after it iselevated.

Signed by me at Newton, Iowa, this 20th day of February, 1902. v V

NIELS K. SKOW, Witnesses:

OLIVER P. MYERS, ADAM M. HARRAH.

